Title:
LED ILLUMINATION DEVICE AND OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2013/014809
Kind Code:
A1
Abstract:
There is provided a LED illumination device and optical element used therein, the device having excellent light distribution characteristics without being affected by the arrangement or number of light sources and without incurring high costs. Although light patterns (PT1 to PT4) emitted from quadrilateral LED chips (LCa to LCd) are quadrilateral, the phase angles are mutually different and thus overlap when rotated around a center, and as a result, light distribution characteristics that are substantially round in shape can be achieved without the need to provide a scattering part or the like in the optical element, and mold manufacturing is facilitated.
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| JPS5831618 | 【考案の名称】車輛用灯具 |
Inventors:
ONO YUKI (JP)
Application Number:
PCT/JP2011/070829
Publication Date:
January 31, 2013
Filing Date:
September 13, 2011
Export Citation:
Assignee:
KONICA MINOLTA ADVANCED LAYERS (JP)
ONO YUKI (JP)
ONO YUKI (JP)
International Classes:
F21V19/00; F21V5/00; F21V5/04; F21Y101/02
Foreign References:
| JP2011124034A | 2011-06-23 | |||
| JP2006331817A | 2006-12-07 |
Attorney, Agent or Firm:
TAMURA Keijiro et al. (JP)
Keijichiro Tamura (JP)
Keijichiro Tamura (JP)
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Claims:
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